AutoFlex Flex One Driver Shaft
A single-spec shaft, engineered for one thing: efficient power transfer at moderate swing speeds.
Flex One is AutoFlex's ultralight, Korean-made shaft built for golfers with clubhead speeds up to 90 mph. Unlike conventional flex ratings, AutoFlex shafts are engineered to load and unload at specific points in the swing depending on your clubhead speed — the shaft itself does the work of timing energy release through impact, rather than relying on swing effort alone. For golfers with a smooth, moderate-speed tempo, Flex One is built to be the direct fit, not a compromise between stiffer options.
Every shaft ships fully built — installed with your choice of driver adaptor and grip, inclusive. No separate build fee, no waiting on a third-party shaft installer.
Specifications
| Spec | Detail |
|---|---|
| Flex | Flex One |
| Weight | 39g |
| Recommended Swing Weight | C5–C8 |
| Recommended Driver Clubhead Speed | 60–90 mph |
| Tip Diameter | 0.335" |
| Raw Length | 45" |
| Recommended Build Length | 45" (to control swingweight) |
| Origin | Korean-made |
Fitting Note
Recommended build length is 45" specifically to keep swingweight within the C5–C8 range this shaft is designed around — building shorter or longer shifts swingweight outside its intended performance window. If you're unsure whether Flex One or a different AutoFlex spec matches your swing speed, our fitting sessions confirm the right build before anything is cut or installed.
